Superconducting 345 MHz two-spoke cavity for RIA

Author

Fuerst, J.D. ; Kedzie, M. ; Kelly, M.P. ; Shepard, K.W. ; Peterson, E.

Author_Institution

Argonne Nat. Lab., IL, USA

Volume

2

fYear

2003

fDate

12-16 May 2003

Firstpage

1294

Abstract

This paper reports development of a two-cell 345 MHz spoke-loaded superconducting cavity intended for the U.S. RIA Project driver linac. The 3 cm aperture cavity has a useful velocity range 0.3 c < v < 0.6 c. In initial tests at 4 K the prototype cavity operated cw at peak surface electric fields as high as 40 MV/m, and with 20 Watts of rf input power provides 3 MV of effective total accelerating voltage. As constructed, the niobium cavity shell was fully housed in an integral stainless-steel helium vessel using pure copper braze joints at the niobium to stainless-steel transitions.

Keywords

accelerator RF systems; accelerator cavities; ion accelerators; linear accelerators; particle beam dynamics; superconducting cavity resonators; 20 W; 3 MV; 3 cm; 345 MHz; 4 K; RIA; aperture cavity; effective total accelerating voltage; integral stainless-steel helium vessel; niobium cavity shell; niobium-to-stainless-steel transitions; peak surface electric fields; prototype cavity; pure copper braze joints; rf input power; superconducting two-spoke cavity; Business continuity; Copper; Helium; Linear particle accelerator; Niobium; Rough surfaces; Steel; Surface roughness; Testing; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289683

Filename

1289683